chore: cherry-pick 5f8ddef5a6 from chromium #32789
Merged
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Subject: Fire iframe onload for cross-origin-initiated same-document navigations
A cross-origin initiator can check whether or not onload fired to
guess the url of a target frame. Always firing onload makes it
appear to be a cross-document navigation, even when it wasn't.
Bug: 1248444
Change-Id: I79249cb441f61ac6cab65ab9e5dd4a44b291bc4a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3193885
Commit-Queue: Nate Chapin japhet@chromium.org
Reviewed-by: Rakina Zata Amni rakina@chromium.org
Cr-Commit-Position: refs/heads/main@{#931681}
Notes: Security: backported fix for chromium:1248444